I pay month-by-month with my Live-membership so i only play it during vacations.
I've always praised this game for having the best Alien A.I. of any Alien-featuring game to date. They look move, attack, and behave in all the ways I'd expect them to, and then some that i don't, even more terrifying. This game definitely presents the best Alien experience, both Versing and playing them, ESPECIALLY on the higher difficulties and lower brightness settings.
The predators a pretty awesome. I was a little disappointed that they don't have separately-animated stealth kills for aliens, but the visor systems look very canon-authentic, as well as the sounds and basic movement. Weapons are a lot of fun to toy with, but nothing feels quite the same as getting in their and ghosting humans with the Pred's shortblades.
Great game, I love the multiplayer gameplay a ton. It's turns me off a bit that finding games takes so darn long, unfortunately.